Steam exhaust pipe arrangement for articulated locomotives



Jan. 5, 1937. E. STEELE 2,066,370 STEAM EXHAUST PIPE ARRANGEMENT FOR ARTIdULA'I'ED LOCOMOTIVES Filed Sept. 27, 1955 -2 Sheet-Sheet 1 Fig.2

Fig.1

" INVENTOR Edward Sreele Jan. 5, 1937.

E. STEELE STEAM EXHAUST PIPE ARRANGEMENT FOR ARTICULATED LOCOMOTIVES 2 Sheets-Sheet 2 Filed Sept. 27, 1955 INVENTOR Edward $+ee1e UNITED STATES PATENT OFFICE STEAM EXHAUST PIPE ARRANGEMENT FOR- ARTICULATED LGCOMOTIVES Edward Steele, Walla Walla, Wash.

Application September 27, 1935, Serial No. 42,493

8 Claims.

This invention relates generally to a steam and exhaust arrangement for a simple Mallet articulated type locomotive and more particularly to an improved arrangement of steam pipes adjacent to the rear cylinders whereby the steam may be eifectively supplied to the front and rear cylinders.

Various prior art arrangements have been heretofore suggested for supplying steam to the front and rear cylinders and exhausting the steam therefrom. Certain of the diificulties with these prior arrangements is the necessity for utilizing the central cavity of the rear cylinder saddle as a part of the steam supply passage for the forward pair of cylinders. This has necessitated a saddle casting that is sufliciently strong and heavy so that it is pressure-proof and in addition considerable machine work is required so as to make it steam tight, thereby increasing the cost and complications of such a structure.

It is an object of my invention to provide an improved arrangement of piping that will be economical in construction and maintenance and efficient in operation without necessitating a heavy steam tight saddle casting. A further object is to provide an improved arrangement of piping that will be simple so as to minimize complications in the construction of the piping and in supporting the same with respect to various elements of the locomotive frame.

Other objects and advantages will be more apparent to those skilled in the art from the following description of the accompanying drawings in which:

Fig. 1 is a diagrammatic side elevation of a locomotive showing the forward and rear cylinders of a simple mallet articulated type of locomotive;

Fig. 2 is a plan view of the piping arrangement constituting the present invention and isolated from the remaining locomotive structure;

Fig. 3 is a cross-section on the line 33 of Fig. 1 showing the steam supply pipes alone;

Fig. 4 is a section on line 4-4 of Fig. 1 showing the exhaust pipes alone;

Fig. 5 is a longitudinal view, partly in section, of the steam pipes and details of a ball and socket and slip joint located immediately ahead of the rear cylinders.

In the particular embodiment of the invention which I have disclosed herein merely for the purpose of illustrating one specific form among possible others that the invention might take in practice, I have conventionally shown a boiler 2 having a steam dome 3. A forward pair of cylinders 4 and a rear pair of cylinders 5 are supplied with steam from steam dome 3 through a usual pipe 6 leading through a usual superheater header generally indicated at l and thence downwardly and laterally to each side of the boiler as generally indicated at 8. Connected to each of the lateral outlets 8 are elbows 9, these elbows in turn being respectively connected to pipes I0 and l I running longitudinally along the outside of the boiler and then preferably curving downwardly for connection to Ts l2 and I3 into which is connected a cross-over pipe M. The Ts l2 and I3 are connected into the rear pair of cylinders 5 through pipe and elbows l5 and [6. The cross-over pipe I4 is preferably curved downwardly as shown in Fig. 3 and a T connection ll projects downwardly from the center of the cross-over pipe.

Steam is supplied to the front cylinders through a'suitably packed slip joint l8 associated with the and socket connecting into supply pipe 2| leading to the front pair of cylinders 4 as shown in Fig. 1.

From the foregoing disclosure it is seen that steam is supplied through pipes I0 and II and elbows l5 and I6 directly to the rear pair of cylinders while steam for the front pair of cylinders is diverted from pipes l0 and II into cross-over pipe 14 and thence through elbow l9 and pipe 2| to the front cylinder. The cross-over pipe laterally diverts steam from pipes I 0 and l I at a point in front of the rear cylinders, thus avoiding the necessity of having the steam for the cylinders pass through the rear cylinder saddle box cavity. Any expansion is taken up by the ball and slip connections [8 and 20, it being understood that the connection at 22 for the front cylinders is fixed. The fitting 23 of the ball connection 20 is slidably supported by a crosstie 24 attached to the main frames of the locomotive.

The exhaust for the front cylinders takes place through usual exhaust pipes 26 leading through nozzles 26' to the smokebox. Exhaust steam from the rear cylinders is conducted through a lateral pipe 21 connecting into a pipe 28 which in turn is connected through a pipe 29 to the smokebox.

From the foregoing disclosure it is seen that I have provided an extremely simple, economical and yet effective piping arrangement that permits efiicient supply and exhaust of steam for the front and rear cylinders without unnecessary complications or heavy cylinder saddle construction. The cross-over pipe I4 functions not only as a steam pipe but also as a rigid cross-tie to I to rear cylinders, a cross-over pipe disposed in front of said rear cylinders and connected into said longitudinal pipes, and a pipe connected to said cross-over pipe and leading forwardly to said forward cylinders.

2. The combination in a mallet", articulated type locomotive having forward and rear cylinders and a boiler, a pair of longitudinal live steam pipes leadingfrom said boiler rearwardly to said rear cylinders, across-over pipe disposed in front of said rear cylinders and connected into said longitudinal pipes, a pipe connected to said cross- ;over pipe and extending forwardly to said forward cylinders, means for securingsaid forwardly extending pipe in fixed relation to said forward cylinders, and a flexible connection between said forward pipe and said cross-over pipe.

3. The combination in a mallet articulated type locomotive having forward and rearcylinders and a boiler, a pair of longitudinal live steam pipes leading from said boiler rearwardly to said rear cylinders, a cross-over pipe disposed in front of said rear cylinders and connectedinto said longitudinal pipes, a. pipe extending forwardly from said cross-over pipe to said forward cyl- I inders, and a ball and socket elbow for connecting said forwardly extending pipe to said cross,- over pipe.

,4. The combination in a mallet articulated, type locomotive having forward and rear cylin f ders and a boiler, .a pair of longitudinal live steam pipes leading'from said boiler rearwardly to said rear cylinders, a cross-over pipe disposediin front of said rear cylinders and connected into said longitudinal pipes, a pipe extending, for-j wardly from said cross-over pipe to said forward? cylinders, and means including a vertical slip joint for connecting said forwardly extending pipe to said cross-over pipe.

5. The combination in a mallet articulated type locomotive having forward and rear cylinders and a boiler, a pair of longitudinal live steam pipes leading from said boiler rearwardly to said rear cylinders, a cross-over pipe disposed in front of said rear cylinders and comiected into said longitudinal pipes,- a pipe extending-forwardly from said cross-over pipe to said forward-"cylinders, and a vertical slip joint and a horizontally extending ball and socket joint for connecting said forwardly extending. pipe to said cross-over pipe.

6. The combination in a mallet articulated type locomotive having forward and rear cylinders and a boiler, a pair of longitudinal live steam pipes leadingfromsaid boiler rearwardly to said rear cylinders, a cross-over pipe disposed in front of said-rear cylinders and connected into said a longitudinal ,pipes, and. a. pipe dependently ,con-

nected to said cross-overjpipej'from substantially thecenter "thereof and extending forwardl'yf to said forward cylindera,

7..Ihe combination, in a man e articulated, type locomotive having forward andrear cyl'in ders anda boiler, a pair oflongitudinal live steam;

pipes leadingfromsaid boiler rearwardly to said rear cylinders, a downwardly fcurved cross-over pipe disposed. in front. of said rear cylinders and connected vintosaid l'ongit'udinalpipes, and a;

pipeconnectedfto the lowermost point 'offsaid j. curved cross-over pipe and extending forwardly to said forward cylinders.

arrne combination m awaue articulated type locomotive V havingv forward 1 and rear ders and a boi1er,ja pairof longitudinal live st pipes, leading :fro'r'n'i'said boiler rearwardly'tds'aid" 1 rear cylinders, a cross-over -pipe disposed mrron'i,

of said rear cylinders connected into'isa'idf longitudinal pipesi a' pipe connected tosaid'cross over pipe andextendit rg forwardly to Said'forward cylinders, andfrear 'cylinderexhaust pipes including .a'pipe extending forwardly from onefo'f said rear cylinders and a pipe extending lateral:

rear cylinders.

. ly' therefrom for connectionto'the otherof said 

